Type/Severity

Topic

Red Hat Product Security has rated this update as having Important securityimpact. Common Vulnerability Scoring System (CVSS) base scores, which givedetailed severity ratings, are available for each vulnerability from theCVE links in the References section.

Description

X.Org is an open source implementation of the X Window System. It providesthe basic low-level functionality that full-fledged graphical userinterfaces are designed upon.

Multiple integer overflow flaws and out-of-bounds write flaws were found inthe way the X.Org server calculated memory requirements for certain X11core protocol and GLX extension requests. A malicious, authenticated clientcould use either of these flaws to crash the X.Org server or, potentially,execute arbitrary code with root privileges. (CVE-2014-8092, CVE-2014-8093,CVE-2014-8098)

It was found that the X.Org server did not properly handle SUN-DES-1(Secure RPC) authentication credentials. A malicious, unauthenticatedclient could use this flaw to crash the X.Org server by submitting aspecially crafted authentication request. (CVE-2014-8091)

Multiple out-of-bounds access flaws were found in the way the X.Org servercalculated memory requirements for certain requests. A malicious,authenticated client could use either of these flaws to crash the X.Orgserver, or leak memory contents to the client. (CVE-2014-8097)

Multiple out-of-bounds access flaws were found in the way the X.Org servercalculated memory requirements for certain requests. A malicious,authenticated client could use either of these flaws to crash the X.Orgserver. (CVE-2014-8095, CVE-2014-8096, CVE-2014-8099, CVE-2014-8100,CVE-2014-8101, CVE-2014-8102)

All xorg-x11-server users are advised to upgrade to these updated packages,which contain backported patches to correct these issues.

Solution

Before applying this update, make sure all previously released erratarelevant to your system have been applied.

This update is available via the Red Hat Network. Details on how to use theRed Hat Network to apply this update are available athttps://access.redhat.com/articles/11258

Affected Products

Red Hat Enterprise Linux Server 5 x86_64

Red Hat Enterprise Linux Server 5 ia64

Red Hat Enterprise Linux Server 5 i386

Red Hat Enterprise Linux Workstation 5 x86_64

Red Hat Enterprise Linux Workstation 5 i386

Red Hat Enterprise Linux Desktop 5 x86_64

Red Hat Enterprise Linux Desktop 5 i386

Red Hat Enterprise Linux for IBM z Systems 5 s390x

Red Hat Enterprise Linux for Power, big endian 5 ppc

Red Hat Enterprise Linux Server from RHUI 5 x86_64

Red Hat Enterprise Linux Server from RHUI 5 i386

Fixes

BZ - 1168680 - CVE-2014-8091 xorg-x11-server: denial of service due to unchecked malloc in client authentication